Soil temperature is ALWAYS under control with a soil heating cable. Controlled bottom heat promotes rapid growth and produces vigorous plants with well developed root systems. Great for starting seeds and cuttings! Uses 14 watts per sq. ft. Built-in thermostat set for 70° F. 110 volts, 168 watts, 12 to 14 square feet.

Note:
The maximum temperature this cable can maintain is dependent on the cable spacing, the medium, moisture level of the medium, and the air temperature. Optimum spacing for cables is 2-3 inches apart.